“Survivor” (8 p.m., CBS): Can you believe this reality-TV mainstay is entering its 29th season? Neither can we. This time, we’re heading to the beaches of Nicaragua and reviving the “Blood vs. Water” concept in which loved ones are pitted against each other on competing tribes. Among the contestants are “Amazing Race” twins Natalie and Nadiya Anderson and former major league pitcher John Rocker.

“The Middle” (8 p.m., ABC): One of our favorite TV families returns for its sixth season and BIG things are happening for the Hecks. How big? Well, Sue (Eden Sher) is entering her senior year and finally getting her braces off. Three cheers for Sue!

“Black-ish” (9:30 p.m., ABC): The buzzy new family sitcom is pegged to a successful business man (Anthony Anderson) with a great wife (Tracee Ellis Ross) and adorable kids. But he worries that they’ve lost touch with their African-American heritage.

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“The Mysteries of Laura” (8 p.m., NBC): Debra Messing returns in this dramedy as Laura Diamond, an NYPD homicide detective who balances her day job with a crazy family life that includes unruly twin boys and a soon-to-be ex-husband. But here’s the real mystery: What casting director thought Messing would make a believable cop?

Elon Musk unveiled his underground transportation tunnel on Tuesday, allowing reporters and invited guests to take some of the first rides in the revolutionary albeit bumpy subterranean tube — the tech entrepreneur's answer to what he calls "soul-destroying traffic."